public class Main {
    public static void main(String[] args) {
        String name = "刘冰";
        System.out.println(name);

        double a,b,c,exiguous;
        a = 3;
        b = 5;
        c = 4;
        exiguous = (a+b)*c/2;
        System.out.println("梯形的面积："+exiguous);
    }
}